Home / 21,047.79-31,578.17-9,364.35

Finding the Fourth Proportional to 21,047.79, 31,578.17 and 9,364.35

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Solution

The fourth proportional to 21,047.79, 31,578.17 and 9,364.35 is: 14,049.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,047.79 : 31,578.17 = 9,364.35 : x
  2. Step 2: Convert to fraction form
    21,047.79/31,578.17 = 9,364.35/x
  3. Step 3: Cross multiply
    21,047.79x = 31,578.17 × 9,364.35
  4. Step 4: Simplify right side
    21,047.79x = 295,708,989.42
  5. Step 5: Solve for x
    x = 295,708,989.42/21,047.79
  6. Step 6: Final answer
    x = 14,049.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.